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sensor |
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sensorA device that measures or detects a real-world condition, such as motion, heat or light and converts the condition into an analog or digital representation. An optical sensor detects the intensity or brightness of light, or the intensity of red, green and blue for color systems. See smart sensor, sensor network and mote. sensor anything, such as a photoelectric cell, that receives a signal or stimulus and responds to it sensor [′sen·sər] (engineering) The generic name for a device that senses either the absolute value or a change in a physical quantity such as temperature, pressure, flow rate, or pH, or the intensity of light, sound, or radio waves and converts that change into a useful input signal for an information-gathering system; a television camera is therefore a sensor, and a transducer is a special type of sensor. Also known as primary detector; sensing element.
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| The nanotube-based chemical sensors developed so far generate an electric signal in the presence of a particular molecule. Editorial will focus on "important" new scientific and technological findings in such fields as fiber optics, sonar, thermal, electromagnetic, biotoxin and chemical sensors. Physical and chemical sensors that reduce the risks associated with farming are the topics of two reports issued by the Technology Transfer Information Center, which is part of the USDA's Agricultural Research Service in Beltsville, MD. |
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